The spotting comes just one day after CNN's report that Michael Cohen, Trump's former personal attorney, claims that he is willing to assert to Mueller that then-candidate Donald Trump had advance notice of a June 2016 meeting at Trump Tower that Trump Jr. attended.

The meeting was premised on the expectation that Russians would offer campaign dirt on Hillary Clinton, and it's become a key focus of Mueller's probe into Russian meddling in the 2016 election and whether the Trump campaign coordinated with Moscow.